P1319: T AND B LYMPHOCYTES SUBSETS AFTER BNT162B2 ANTI-SARS-COV-2 M-RNA VACCINATION: A COMPARISON BETWEEN HEMATOPOIETIC STEM CELL TRANSPLANTATION PATIENTS AND HEALTHY CONTROLS. (23rd June 2022) - Attolico, I.; Tarantini, F.; Schifone, C. P.; Mestice, A.; De Tullio, G.; Derosa, C.; Carbone, F.; Negri, A.; Carluccio, P.; Delia, M.; Albano, F.; Larocca, A. M. V.; et al.